ORA-24070

Error: ORA-24070: cannot upgrade queue table string while it is being downgraded

Causa: An attempt was made to upgrade a queue table, but a previous command to downgrade the queue table has not yet completed successfully.

Acción: Complete the downgrade of the queue table by re-executing the DBMS_AQADM.MIGRATE_QUEUE_TABLE procedure. Then, upgrade the queue table.